Apparently they are completely bogus sites that take your money and send you nothing. One was only accepting payemnt in Bitcoin and other crypto, of course that is a red flag. There were two URL's:
https://remingtonarmsusa.com/remington-rm380-380-acp-carry-conceal-pistol/ This site is no longer active, but if you Google it there are reports all over the web that it was a straight up scam.
There is anotehr one with similar URL that is still up:
https://remingtonusaguns.com/product/remington-rm380-380-acp-carry-conceal-pistol/I couldn't find any reviews of it, but I think it is also a scam. Website is still active and requires payemnt via Zelle. Of course, there has been al ot of publicity about Zelle scams online lately as well.
Due to Remington's bankruptcy, there is a fair amount of confusion regarding what they are producing, wht the exact company name is, what their website URL is, etc., and scammers are diving in to take advantage. Beware!